<div class="loader">
  <div class="circle"></div>
  <div class="circle"></div>
  <div class="circle"></div>
  <div class="circle"></div>
</div>
<style>
/* From Uiverse.io by boryanakrasteva - Tags: loader */
.loader {
  position: relative;
}

.circle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 0px;
  height: 0px;
  border-radius: 100%;
  opacity: 0;
  animation: pulse_4923 4s infinite linear;
  border: 0.5px solid #f3f3f3;
  box-shadow: 0px 0px 5px #eef0e5;
}

.circle:nth-child(1) {
  animation-delay: .2s;
}

.circle:nth-child(2) {
  animation-delay: .4s;
}

.circle:nth-child(3) {
  animation-delay: .8s;
}

.circle:nth-child(4) {
  animation-delay: 1s;
}

@keyframes pulse_4923 {
  0% {
    opacity: 0.0;
    width: 0px;
    height: 0px;
    transform: translate(-50%, -50%) scale(1);
  }

  10% {
    opacity: 0.5;
    transform: translate(-50%, -50%) scale(2);
  }

  100% {
    opacity: 0.0;
    width: 100px;
    height: 100px;
    transform: translate(-50%, -50%) scale(1);
  }
}

</style>
